Norton 66252939698 Surface Grinding Wheel 7in 60 Grit

Product Description

The NORTON 66252939698 is a Type 1 surface grinding wheel engineered for precision stock removal on soft carbon steels, tool steels, and super alloys. Built with white aluminum oxide abrasive and a vitrified bond, it delivers consistent, controlled cutting action across a wide range of surface and cylindrical grinding applications. The wheel measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. At 60 grit with J hardness (medium grade), it is suited for moderate material removal where surface finish and wheel integrity both matter. Maximum operating speed is rated at 3600 RPM. Installed by machinists and grinding technicians in production and toolroom environments.

This wheel fits surface grinders, cylindrical grinders, and CNC cutting tool machines. The 38A Type 1 series is a standard configuration in toolroom and production grinding where aluminum oxide abrasive performs well on ferrous metals. The non-porous, semi-friable structure keeps the wheel face open and cutting cleanly on softer and medium-hardness workpieces. It is appropriate for both setup and production passes where dimensional accuracy is required.

Key Features

• White aluminum oxide abrasive for consistent cut on carbon steels, tool steels, and super alloys
• Vitrified bond provides rigid, stable cutting action and easy dressing
• 60 grit medium grade for balanced stock removal and surface finish
• J hardness code with semi-friable structure helps maintain a sharp, open wheel face
• Type 1 flat wheel profile with no recess and no taper for straightforward mounting
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. Arbor hole of 1-1/4 inches fits standard spindle configurations for 7-inch Type 1 wheels.

Installation Notes

Grinding wheel installation and dressing should be performed by qualified personnel following ANSI B11.9 and applicable shop safety standards. Before mounting, inspect the wheel for cracks or chips using the ring test. Ensure the machine spindle speed does not exceed the 3600 RPM rating marked on the wheel. Power down and lock out the grinder before changing wheels, and use proper flanges and blotters as specified by the grinder manufacturer.